Needle-sharpening device



June 10, 19240 R. O. WOOD NEEDLE SHARPENING DEVICE Filed Jan. 15, 1923 Patented June 10, 1924.

UNITED STATES RUBY O. "WOOD, OF SEATTLE, WASHINGTON.

NEEDLE-SHARPENING DEVICE.

Application filed January 15, 1923. Serial No. 612,857.

To all whom it may concern:

Be it known that I, RUBY O. WVooD, a citizen of the United States of America, residing at Seattle, in the county of King and State of Vashington, have invented certain new and useful Improvements in Needle- Sharpening Devices, of which the following is a specification.

The invention relates to improvements in a device for sharpening the points of phonegraph needles.

It is an object of the invention to provide a sharpening device which may be freely placed on a record table of a phonograph when it is desired to sharpen needles, so as to be removed and stored to occupy little space when not in use.

The present device more specifically embodies a sharpening device of substantially pan shaped form provided with a central cap adapted to receive the record holding pin on the phonograph table.

The pan is provided with an abrasive surface and is also provided with a peripheral flange so as to prevent the abrasive material and the ground substances removed from the needle from being thrown from the pan during the rotation thereof on the record holder.

The invention further comprises improved means for holding the needle when the same is in contact with the rotating pan on the record holder. This holder embodies an elongated handle slightly enlarged at one end and the other portion having resilient split ends fashioned to receive a needle, with a slidable collar for causing the handle to be engaged and held by said resilient ends.

In the accompanying drawings I have disclosed a preferred form of my invention, but this disclosure is merely for the purpose of illustration, and the invention is susceptible of many changes.

Referring now more particularly to the drawings wherein like reference characters indicate corresponding parts, the numeral 1 designates a phonograph which may be of any conventional type having the record table 2 thereon. This table is formed with the usual fabric covering 3 and has a central record receiving pin 4:. The table is rotated by anysuitable source of power, such as an electric or spring motor. The phonograph is provided with the usual sound producing mechanism receiving the needle, but inasmuch as said mechanism forms no part of this invention it is not herein disclosed.

The present invention aims to provide a means for sharpening the needles of a phonograph, whether they be metal, wood fiber, or the like. The points of these needles when in use rapidly wear away, and after a short time it is necessary to either discard the needles or to resharpen them. As a most convenient means of sharpening the needles I provide a sharpening deviceo which preferably is pan shaped having a bottom portion 6 and an upstanding peripheral flange with a rolled edge 7 An abrasive material 8, which may be carborundum stone or cloth, emery, sandpaper, or the like, i

is cut circular, almost as large as the pan, with a hole in the center so that it may he slipped over the central cap. The pan is formed with a perforation 9 at its central portion receiving the cap 10. This cap is so constructed that it fits over the record receiving pin of therecord table to prevent its displacement of the sharpening pan during its rotation and also to prevent the detached abrasive substances and the fine metal resulting from grinding of the needle, ends from passing down. onto the record holder or into the internal parts of the machine.

To hold said abrasive material in position various fastening devices may be employed, but I preferably provide a circular collar 7 which is formed with a rolled upper edge 8 and an interned lower flange 9. The side of this retainer is. preferably threaded, the threads thereon cooperating with threads 12 on the upstanding peripheral flange of the pan shaped sharpener 5. It will thus be seen that by placing a disk of abrasive material on the bottom of the pan and that by screwing the holder to the pan, the disk is held tightly in position, and no openings are provided for the escape of the metal ground from the needles. Other forms of fastening devices can, of course, be used, but this construction has been found preferable to others known to me.

It will be understood that the present device is an attachment which can be applied to any record holder. The outer peripheral flange 7 serves to prevent the discharge of detached metallic substances from the needles or the abrasive material during; the rapid rotation of the pan and the cap likewise prevents'the escape of such substances.

In use a needle is held into contact with the abrasive material on the bottom of the pan and the table permitted to rotate. This causes a rotation of the pan and the operator positions the needle so that the abrasive substance places the proper point on the same.

As a convenient means for holding the needles I have provided a holding device having a handle 11, one end of the device being slightly enlarged so as to prevent the sliding cap from slipping oil, and the other end being provided with the elongated slot 12 providing the resilient ends 13. A needle is positioned between said resilient ends, and the sliding cap 14 then moved over the slightly outwardly bulged part 15 on each of said resilient ends to force said ends into frictional engagement with the needle. The holder is then grasped by the hands of the user, and held into contact with the abrasive material during the rotation of the instrument.

Having thus described my invention, what I claim is:

1. A portable sharpening device for phonograph needles adapted to be placed upon a rotating phonograph record holder, said device having a bottom portion, an abrasive substance, a circular collar holding said substance carried thereby 1n position, and a side flange pro ecting upwardly irom said bottom at the periphery thereof cooperating with the collar, said device being provided with a central perforation to permit said device to receive a record centering pin and a cap having a hollow interior surrounding said perforation and adapted to enclose the centering pin.

2. A sharpening device for phonograph needles adapted to be placed upon arecord table of a phonograph, said device having a bottom, the under surface of which is covered with felt, an abrasive substance car ried by said device flanges projecting from the peripheral portion of said bottom, acollar cooperating therewith for holding said substance in place, said device having a central aperture therein, and a cap provided with a hollow interior surrounding said aperture and receiving the record supporting pin.

3. A portable sharpening device for phonograph needles having a body portion adapted to be seated on a rotating table of a phonograph, and an abrasive material carried by said body, saidbody being formed with means to receive a record centering pin to hold the body in position, said centering means including a cap carried by the body enclosing said pin, and a peripheral flange arranged on said body to prevent the discharge of materials resulting from the abrasive treatment.

4. A portable sharpening device for record needles adapted to be reinovably seated on a phonograph record table, said device comprising a base seated on said table, abrasive material carried thereby, and a peripheral flange projecting upwardly from said base to prevent the discharge of products fromsaid base resulting from the abrasive treatment.

5. A portable sharpening device for record needles adapted to be removably seated on a phonograph record table, said device comprising a base seated on said table, abrasive material carried thereby, and a peripheral flange projecting upwardly from said base to prevent the discharge of products resulting from the abrasive treatment from said base, and a removable collar cooperating with said flange for maintaining the abrasive material in position.

In testimony whereof I affix my signature.

RUBY O. WOOD. 

